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#include <string.h> void *memmove(void *dest, const void *src, size_t n) { char *d = dest; const char *s = src; if (d==s) return d; if ((size_t)(d-s) < n) { while (n--) d[n] = s[n]; return dest; } /* Assumes memcpy is overlap-safe when dest < src */ return memcpy(d, s, n); }